Cups = c
Plates = p
6p + 5c = 23.80 ==> multiply by 6 ==> 36p + 30c = 142.80
7p + 6c = 28.00 ==> multiply by 5 ==> 35p + 30c = 140.00
Now use algebra to have the 30c be on one side and the rest on the other:
36p + 30c = 142.80 | -36p
30c = 142.80 - 36p
35p + 30c = 140.00 | -35p
30c = 140.00 - 35p
Now set them equal to each other about the 30c:
142.80 - 36p = 140.00 - 35p
Use algebra to solve for p:
142.80 - 36p = 140.00 - 35p | +36p
142.80 = 140.00 + p | - 140
2.80 = p
Go back to one of the "30c" equations and plug in the value for p:
30c = 140 - 35p
30c = 140 - 35(2.80)
30c = 140 - 98
30c = 42 | /30
c = 42/30
c = 1.4
Plates are $2.80
Cups are $1.40
Answer:
c, Z
Step-by-step explanation:
x+y=4
<u>y+z=5</u>
y=4-x
4-x+z=5
<u>-</u><u>x</u><u>+</u><u>z</u><u>=</u><u>1</u>
z=1+x
Answer:
1/3
Step-by-step explanation:
rate of change, or slope, is the change in y's divided by the change in x's
(5 - 3) / (7-1) = 2/6 = 1/3
I think 6-8 cubes have 0 sides showing
Not sure;)
